Power supply device for an at least partially electrically operable motor vehicle, a first electrical and a second electrical energy store being coupled directly to a charging connection, and method

摘要

The invention relates to a voltage supply device (10) for an at least partially electrically operated motor vehicle, with a first electrical energy store (12), which provides a first DC voltage (V1) for an electrical system (14) of the motor vehicle, with a second electrical energy store (18) which provides a second direct voltage (V2) different from the first direct voltage (V1), with a bidirectional direct voltage converter (16), which is coupled to the first electrical energy store (12) and the second electrical energy store (18), and with a charging connection ( 20) for charging the first electrical energy store (12) and the second electrical energy store (18) by means of a charging voltage (22), the voltage supply device (10) being designed such that the first electrical energy store (12) and the second electrical energy store ( 18) can be coupled directly to the charging connection (20) , The invention further relates to a method.